standard deviation
nounEtymology Coined by English mathematician, biometrician, and eugenicist Karl Pearson in 1894 in his paper "On the dissection of asymmetrical frequency curves".
1
Mathematics, Sciences, Statistics A measure of how spread out data values are around the mean, defined as the square root of the variance. Represented with the Greek letter σ (sigma).
- Synonyms
- standard error, sigma